.nav {
  height: 55px;
  background: #55aaff;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 9999;
}

.postIconfont {
  padding: 10px;
  color: #fff;
  font-size: 20px;
}

.navLeft {
  display: flex;
  height: 45px;
  line-height: 45px;
}

.navBtn {
  padding: 0 10px;
  color: #fff;
  font-size: 16px;
  transition: all .1s;
}

// 按钮选中效果
.Selected {
  font-size: 18px;
  font-weight: 600;
}



